Sudoku Library
All Puzzles
Beginner
Easy
Medium
Hard
Expert
Master
Leaderboard
Achievements
Links
My Account
Menu ▾
All Puzzles
Beginner
Easy
Medium
Hard
Expert
Master
Leaderboard
Achievements
My Account
Hardpuzzles
(153663 puzzles)
6
4
7
3
1
5
1
7
2
6
7
1
4
3
2
3
6
1
4
4
6
7
1
8
3
5
6
9
7
4
3
4
7
5
6
1
Difficulty rating: 6.8
Rating: 6.8
4
3
1
6
5
7
8
1
1
4
9
5
2
3
7
3
4
6
8
5
2
4
1
8
9
1
3
5
4
6
9
2
Difficulty rating: 6.8
Rating: 6.8
7
2
9
7
6
8
8
3
6
8
1
4
9
2
5
1
5
2
6
3
8
9
6
4
2
9
4
6
3
6
7
Difficulty rating: 6.8
Rating: 6.8
9
4
5
5
1
8
2
8
5
7
3
2
6
5
6
7
1
8
8
7
3
4
6
5
6
5
3
2
1
8
3
6
Difficulty rating: 6.8
Rating: 6.8
5
3
2
3
7
4
5
3
2
7
9
3
1
7
2
3
1
5
9
7
2
9
8
4
3
4
7
5
8
8
7
3
9
1
Difficulty rating: 6.8
Rating: 6.8
1
8
6
8
7
9
5
9
8
4
2
2
4
8
6
5
4
8
1
9
2
7
1
9
3
4
5
2
4
1
7
5
6
9
Difficulty rating: 6.8
Rating: 6.8
4
9
5
2
8
7
4
9
9
8
7
9
2
1
3
5
3
1
7
6
5
8
1
4
4
7
6
8
7
3
2
5
Difficulty rating: 6.8
Rating: 6.8
4
8
5
3
2
6
4
5
1
9
7
5
9
4
6
4
8
1
7
2
3
6
2
1
5
9
4
5
1
4
4
5
8
7
5
9
Difficulty rating: 6.8
Rating: 6.8
1
9
8
4
1
6
2
3
5
6
1
7
1
3
8
2
3
8
6
1
1
5
7
6
2
4
5
7
1
6
1
5
7
2
Difficulty rating: 6.8
Rating: 6.8
9
4
2
2
3
4
7
5
9
6
4
2
7
9
2
7
9
5
4
4
6
8
3
4
6
7
3
1
5
1
4
7
9
6
5
Difficulty rating: 6.8
Rating: 6.8
2
5
4
8
6
1
1
3
2
9
7
3
9
6
4
8
2
3
7
5
9
6
8
7
7
3
4
9
3
2
8
2
9
1
5
2
4
6
Difficulty rating: 6.8
Rating: 6.8
3
2
1
7
8
2
2
8
3
4
1
9
5
4
9
4
1
5
1
7
6
9
4
1
2
4
6
7
9
3
1
2
9
Difficulty rating: 6.8
Rating: 6.8
9
3
4
2
1
6
3
1
7
8
9
5
4
7
1
9
2
5
2
7
8
5
7
1
2
8
9
3
5
6
2
4
3
1
Difficulty rating: 6.8
Rating: 6.8
5
4
6
1
3
9
1
5
3
3
9
1
8
3
5
2
4
9
2
5
3
5
4
7
5
9
1
4
7
7
3
1
9
Difficulty rating: 6.8
Rating: 6.8
1
3
9
2
6
7
9
3
1
9
3
4
8
7
6
1
7
4
6
5
2
2
6
9
3
1
5
2
7
8
1
6
Difficulty rating: 6.8
Rating: 6.8
2
3
5
6
7
6
9
2
8
4
3
7
8
9
6
1
6
4
5
3
4
6
9
4
2
1
8
3
9
7
1
9
4
Difficulty rating: 6.8
Rating: 6.8
3
7
8
9
6
7
3
8
5
8
3
6
2
5
1
7
6
3
8
2
4
6
5
9
7
7
4
2
1
3
8
5
2
1
6
9
7
8
3
5
Difficulty rating: 6.8
Rating: 6.8
2
5
9
8
6
8
5
9
2
1
3
2
7
1
5
2
8
4
9
1
5
2
7
6
4
8
7
5
4
3
3
7
8
1
2
6
6
2
3
5
7
Difficulty rating: 6.8
Rating: 6.8
8
1
3
5
6
4
5
9
7
9
3
2
1
6
1
3
8
7
9
5
6
8
6
7
8
8
6
9
4
7
1
1
6
3
1
8
Difficulty rating: 6.8
Rating: 6.8
8
3
1
4
9
7
2
5
9
4
2
7
1
9
6
2
1
2
3
6
7
6
5
3
1
9
3
8
2
5
6
7
1
3
2
Difficulty rating: 6.8
Rating: 6.8
3
2
9
7
8
4
3
1
5
9
9
7
2
1
3
4
6
9
7
9
7
1
6
5
2
4
6
4
8
2
5
1
4
Difficulty rating: 6.8
Rating: 6.8
9
2
5
7
6
4
4
3
7
7
5
3
2
6
4
3
5
8
7
6
8
4
1
1
8
7
3
2
6
5
1
8
7
4
5
3
5
Difficulty rating: 6.8
Rating: 6.8
7
1
3
6
7
9
2
6
5
6
1
5
3
5
1
9
7
3
8
5
1
5
9
4
9
7
1
5
4
8
7
6
Difficulty rating: 6.8
Rating: 6.8
7
8
8
6
3
2
5
6
4
6
5
1
3
2
6
7
5
3
9
2
3
4
8
8
7
2
6
3
5
2
6
6
4
Difficulty rating: 6.8
Rating: 6.8
8
7
5
3
6
4
4
6
1
5
2
3
9
9
8
5
3
2
7
4
8
9
1
1
3
2
6
2
4
3
5
9
7
9
5
6
1
9
3
Difficulty rating: 6.8
Rating: 6.8
3
4
7
8
5
5
4
6
8
6
9
2
4
2
4
7
1
5
4
2
9
2
1
4
6
2
4
7
8
7
9
8
2
8
3
9
Difficulty rating: 6.8
Rating: 6.8
2
9
6
8
5
6
3
7
1
7
9
5
3
4
2
7
8
3
5
2
4
9
1
7
5
2
6
9
8
5
3
4
5
2
Difficulty rating: 6.8
Rating: 6.8
7
5
3
1
3
2
6
3
6
4
5
7
6
3
9
9
2
7
3
6
8
9
2
5
4
1
6
9
4
6
8
1
5
1
6
7
Difficulty rating: 6.8
Rating: 6.8
«
2
3
4
5
6
7
8
9
10
»
Sudoku Library